body {
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#app {
    width: 100%;
    max-width: 400px;
    margin: auto;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    overflow: hidden;
}
.centered-header {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #409EFF;
    color: #ffffff;
    text-align: center;
    padding: 20px 0;
    font-size: 24px;
}

.el-main {
    padding: 20px;
}

.el-form-item {
    margin-bottom: 20px;
}

.el-button {
    width: 100%;
}
